Thermostat



pat 30, 1928. v 1,689,542

E. H. WHITE THERIOSTAT Filed July 20, 1927 In ven fer": Everett H. WhL ta.

Kttorneys Patented Qt-LEW), 1928.

UNITE EVERETT H. wane, on ST. rAn'L, MINNESOTA.

1 OFFICE.

THERMOSTAT.

Application filed July 20,

My invention relates to thermostats, and an object is to provide a device ofthis character having two or more hollow members filled with an expansible fluid, said members being attached to each other at one end and free to move toward and from each other at the other endmnder the contraction and expansion of the fluid.

intended for use more particularly in connection with heat regulators of the character disclosed in my application Serial Number 207,194 filed July 20, 1927, although it is obvious that it .may be used in other relations The full object and advantages of my in-- vention will appear in connection with the detailed description thereof, and the novel features of my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which show two slightly different forms in which my invention may be embodied,

Fig. 1 is an edge elevational view ofjthe thermostat. Fig. 2 .is a view in section on the line 2'2' of Fig. vational view of the thermostat showing it disposed horizontally. Fig. 4 is a view in section on the line 4-4 of Fig. 3. Fig 5 is a fragmentary view in section on line 5 -5 of Fig. 1. Fig. 6 is a sectional View of a modified form of the invention.

As shown in the drawings, the thermostat includes two hollow members 10 and 12 which are connected with each other at one end. These members are formed from a flexible sheetv material preferably sheet metal. As best shown in Fig. 4, two strips 14 and 16 of the material are bent at their middle into elongated U-shape, the bent strip 16 being placed inside of the bent strip 14.

secured together respectively by means of marginal U- haped strips 18 soldered there-' to while the longitudinal edges are secured together by marginal U-sh'aped strips 20 soldered thereto. Inorder to insure a tight seal adjacent the bent portion of the strip 14, U shaped corner pieces 22 are soldered thereto. As shown in Fig. 4, the bent portions of the strips '14 and 16 do not lie in en gagement with each other but areseparated y a small space. This space at one end is closed by a small plug 24 and the other endis provided with a small tube 26 soldered thereto. This 5 projects at one end slightly beyond the My thermostat is- 3. Fig. 3 is a side ele-.

'of the two arms 32 and.34.

- interconnected chambers The free ends of these strips are' tube as shown in Fig.

1927. Serial No. 207,193.

edges of the members and extends only part 7 way across the same. chambers 28 and 30 are thus provided which are sealed fromatmosphere at this time except for the small opening in the tube 26. The chambers are filled with a substance which at'ordinary temperatures is in the form of a gas readily acted upon by heat to cause the thermostat members to expand. T he chambers may be readily filled with the substance by cooling it to liquid form and injecting it. by hypodermic needle through the tube 26, the latter then being sealed by solder. In one form in which I contemplate employing lthe thermostat members just described, an arm 32 to the corresponding end of the member 10 and an arm 34 1s soldered at one end to the corresponding end of the member 12. The

arm 34 contains a hole 36 by means of which the 'device may be pivotally mounted on a support S by a pivot 37 passing through the hole and secured to the support. A U- .shaped spring clamp 38 is notched at its ends as shown m Fig. 3 and these notched ends are engaged with notches near the ends I This clamp serves to hold the arms 32 and 34 and the thermostat members resiliently toward each other but will allow said members to expand and separate further from each other under Two interconnected is soldered at one end the influence of heat. The form -shown in Fig. 6 is similar to that already described,

the'principal difference being that. the strips 14 and 16 are longer than the strips 14 and 16 and in addition to being bent into U- shape at' their middle are also bent into U-shape midway between the middle bend and the outer ends so as to provide four 40, 42, 44, and 46. In this form the arms 32 and 34 are secured sons to extend in the opposite direction and the hole 36 is made in the arm "32 instead of in the arm 34.

While I have referred to my device as a thermostat, it will be understood that the invention is susceptible of other uses such as for pressure gauges.

I claim: a

1. A thermostat comprising hollow members filled with an expansible fluid, said members being attached to each other at one end and freeto move toward and from each other at the other end under the contraction and expansion of said fluid.

"2. A hermostat comprising hollow members filled with an e'xpansible fluid, said members being attached to each other at oneend and freeto move toward and from each other at the other end under the contraction and expansion of said fluid, and means whereby said members may be pivotally mounted on a support.

3. Athermostat comprising hollow members filled with an expansible fluid, said members being attached to each'other at one end and free to move toward and from each other at the other end under the contraction and expansion of said fluid, and an arm carried by one of said members whereby the latter may, be pivotally mounted on a support.

4. A thermostat comprising hollow members filled with an expansible fluid, said members being attached to each other at one end and free to. move toward and from each other at the other end under the contraction and expansion of said fluid, arms secured to said members adjacent one of their ends, and a resilient member which engages said arms and tends'to hold them toward each other.

5. A thermostat comprising hollow members filled. with an to said members adjacent one of their ends,

a resilient member. which engages said arms and tends to hold them toward each other, and means whereby one of said arms may be pivotally mounted on a support.

6. A thermostat comprising hollow members filled with an expan'sible fluid, said members consisting of strips of sheet material bent into U-shape at their middle and secured together along their margins.

7. A thermostat comprising hollow mem bersadapted-to be filled with an expansible fluid, said members consisting of strips of sheet material bent into U-shape at their mflddle and secured together along their margins, and a tube secured to saidbent portlon for filling 'said members with said fluid.

In testimony whereof I hereunto afiix my signatnre. I

EVERETT H. WHITE. 

